Liquid Blocks Mod (1.21.8, 1.20.1) – Instantly Fill Terrain with Flowable Building Materials

Liquid Blocks Mod (1.21.8, 1.20.1) introduces a highly practical mechanic for players and builders alike: placeable liquid versions of various common blocks that solidify after a short time. Whether you’re filling in terrain, patching cave holes, smoothing large surfaces, or just need a bulk material spread fast, this mod turns your typical solid blocks into pourable “cement-style” liquids. After placement, the liquid flows and then hardens back into the original material within a configurable time (default: 200 ticks).

Designed for bulk placement and creative building efficiency, this mod blends the flexibility of fluids with the stability of traditional blocks.

Features:

• Liquid Variants of Key Blocks:
  • Place fluid versions of dirt, sand, stone, and more to quickly fill terrain.
  • Each variant flows like a liquid before solidifying into a full block.
• Supported Block Types:
  • Dirt Types: Regular, Coarse Dirt, Podzol
  • Stone Types: Stone, Granite, Diorite, Andesite
  • Sand & Sandstone: Normal and Red variants
  • Nether Blocks: Soul Sand, Netherrack, Magma Block
  • Building Blocks: Clay, Gravel, Glowstone, Terracotta, Concrete (all colors), and Stained Terracotta (all colors)
• Craftable Fluid Buckets:
  • Each liquid version is obtained via crafting a bucket of that material.
  • Just place the fluid where needed no complicated setup.
• Timed Solidification:
  • Liquid blocks turn into their solid counterpart after a short time (200 ticks by default).
  • The timer is configurable to fit your playstyle or world rules.
• Mod Configuration:
  • Adjust the solidification delay or disable specific block types using the mod’s config file.

Screenshots:

Crafting Recipes:

Recommend that you should install Just Enough Items (for mods using Forge) or Roughly Enough Items (for mods using Fabric) to view the full recipes included in this mod

Requires:

Minecraft Forge

How to install:

How To Download & Install Mods with Minecraft Forge

How To Download & Install Fabric Mods

Why use Liquid Blocks Mod?

If you’re a builder or map maker looking to streamline construction, Liquid Blocks Mod is an ideal utility. It enables large-scale placement of block masses in seconds, perfect for smoothing terrain, filling underground voids, or quickly creating flat surfaces. Instead of manually placing each block, just pour and let the mod do the work. It’s also great for survival builders who need to scale up construction efficiently without complicated redstone or worldedit tools.